/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:28:57,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:28:57,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:28:57,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:28:57,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:28:57,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:28:57,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:28:57,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:28:57,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:28:57,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:28:57,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:28:57,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:28:57,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:28:57,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:28:57,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:28:57,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:28:57,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:28:57,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:28:57,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:28:57,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:28:57,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:28:57,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:28:57,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:28:57,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:28:57,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:28:57,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:28:57,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:28:57,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:28:57,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:28:57,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:28:57,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:28:57,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:28:57,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:28:57,810 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:28:57,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:28:57,810 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:28:57,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:28:57,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:28:57,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:28:57,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:28:57,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:28:57,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:28:57,811 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:28:57,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:28:57,812 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:28:57,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:28:57,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:28:57,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:28:57,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:28:57,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:28:57,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:57,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:28:57,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:28:57,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:28:57,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:28:57,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:28:57,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:28:57,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:28:57,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-18 15:28:58,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:28:58,116 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:28:58,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:28:58,121 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:28:58,122 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:28:58,122 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 15:28:58,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/120c09b11/ec41bf907a3b458fbe477609538ec835/FLAG78aabb1f3 [2020-08-18 15:28:58,626 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:28:58,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 15:28:58,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/120c09b11/ec41bf907a3b458fbe477609538ec835/FLAG78aabb1f3 [2020-08-18 15:28:58,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/120c09b11/ec41bf907a3b458fbe477609538ec835 [2020-08-18 15:28:59,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:28:59,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:28:59,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:59,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:28:59,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:28:59,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:58" (1/1) ... [2020-08-18 15:28:59,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2584cbd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59, skipping insertion in model container [2020-08-18 15:28:59,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:58" (1/1) ... [2020-08-18 15:28:59,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:28:59,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:28:59,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:59,229 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:28:59,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:59,269 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:28:59,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59 WrapperNode [2020-08-18 15:28:59,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:59,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:28:59,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:28:59,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:28:59,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (1/1) ... [2020-08-18 15:28:59,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (1/1) ... [2020-08-18 15:28:59,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (1/1) ... [2020-08-18 15:28:59,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (1/1) ... [2020-08-18 15:28:59,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (1/1) ... [2020-08-18 15:28:59,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (1/1) ... [2020-08-18 15:28:59,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (1/1) ... [2020-08-18 15:28:59,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:28:59,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:28:59,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:28:59,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:28:59,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:59,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:28:59,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:28:59,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:28:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:28:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:28:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:28:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:28:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:28:59,778 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:28:59,779 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 15:28:59,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:59 BoogieIcfgContainer [2020-08-18 15:28:59,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:28:59,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:28:59,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:28:59,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:28:59,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:28:58" (1/3) ... [2020-08-18 15:28:59,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ca7506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:59, skipping insertion in model container [2020-08-18 15:28:59,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:59" (2/3) ... [2020-08-18 15:28:59,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ca7506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:59, skipping insertion in model container [2020-08-18 15:28:59,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:59" (3/3) ... [2020-08-18 15:28:59,791 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-18 15:28:59,802 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:28:59,810 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:28:59,826 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:28:59,853 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:28:59,853 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:28:59,853 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:28:59,853 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:28:59,854 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:28:59,854 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:28:59,854 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:28:59,854 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:28:59,875 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 15:28:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 15:28:59,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:59,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:59,883 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-18 15:28:59,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:59,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103465983] [2020-08-18 15:28:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103465983] [2020-08-18 15:29:00,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055578907] [2020-08-18 15:29:00,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,097 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-18 15:29:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,158 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-18 15:29:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 15:29:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,173 INFO L225 Difference]: With dead ends: 69 [2020-08-18 15:29:00,173 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 15:29:00,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 15:29:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-18 15:29:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 15:29:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-18 15:29:00,218 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-18 15:29:00,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,219 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-18 15:29:00,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-18 15:29:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 15:29:00,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:29:00,222 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-18 15:29:00,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084280010] [2020-08-18 15:29:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084280010] [2020-08-18 15:29:00,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135546615] [2020-08-18 15:29:00,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,290 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-18 15:29:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,324 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-18 15:29:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 15:29:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,327 INFO L225 Difference]: With dead ends: 87 [2020-08-18 15:29:00,327 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 15:29:00,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 15:29:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-18 15:29:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 15:29:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-18 15:29:00,339 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-18 15:29:00,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,340 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-18 15:29:00,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-18 15:29:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:29:00,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:29:00,342 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,343 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-18 15:29:00,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689581555] [2020-08-18 15:29:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689581555] [2020-08-18 15:29:00,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958848806] [2020-08-18 15:29:00,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,397 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-18 15:29:00,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,419 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-18 15:29:00,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 15:29:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,421 INFO L225 Difference]: With dead ends: 81 [2020-08-18 15:29:00,421 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 15:29:00,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 15:29:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-18 15:29:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 15:29:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-18 15:29:00,435 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-18 15:29:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,438 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-18 15:29:00,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-18 15:29:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:29:00,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:29:00,441 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-18 15:29:00,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164442908] [2020-08-18 15:29:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164442908] [2020-08-18 15:29:00,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868510838] [2020-08-18 15:29:00,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,505 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-18 15:29:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,528 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-18 15:29:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 15:29:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,530 INFO L225 Difference]: With dead ends: 100 [2020-08-18 15:29:00,531 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 15:29:00,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 15:29:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-18 15:29:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 15:29:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-18 15:29:00,551 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-18 15:29:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,551 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-18 15:29:00,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-18 15:29:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:29:00,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:29:00,554 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-18 15:29:00,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123516733] [2020-08-18 15:29:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123516733] [2020-08-18 15:29:00,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387446672] [2020-08-18 15:29:00,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,639 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-18 15:29:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,662 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-18 15:29:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 15:29:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,664 INFO L225 Difference]: With dead ends: 164 [2020-08-18 15:29:00,664 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 15:29:00,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 15:29:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-18 15:29:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 15:29:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-18 15:29:00,677 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-18 15:29:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,678 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-18 15:29:00,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-18 15:29:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:29:00,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:29:00,680 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-18 15:29:00,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457149178] [2020-08-18 15:29:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457149178] [2020-08-18 15:29:00,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141997340] [2020-08-18 15:29:00,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,718 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-18 15:29:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,738 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-18 15:29:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 15:29:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,740 INFO L225 Difference]: With dead ends: 147 [2020-08-18 15:29:00,741 INFO L226 Difference]: Without dead ends: 102 [2020-08-18 15:29:00,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-18 15:29:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-18 15:29:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 15:29:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-18 15:29:00,755 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-18 15:29:00,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,755 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-18 15:29:00,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-18 15:29:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:29:00,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:29:00,758 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-18 15:29:00,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972278485] [2020-08-18 15:29:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972278485] [2020-08-18 15:29:00,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748850528] [2020-08-18 15:29:00,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,795 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-18 15:29:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,815 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-18 15:29:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 15:29:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,818 INFO L225 Difference]: With dead ends: 180 [2020-08-18 15:29:00,818 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 15:29:00,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 15:29:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-18 15:29:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 15:29:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-18 15:29:00,835 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-18 15:29:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,835 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-18 15:29:00,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-18 15:29:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:29:00,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:29:00,838 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-18 15:29:00,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007814409] [2020-08-18 15:29:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007814409] [2020-08-18 15:29:00,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031786397] [2020-08-18 15:29:00,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,901 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-18 15:29:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,926 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-18 15:29:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 15:29:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,928 INFO L225 Difference]: With dead ends: 312 [2020-08-18 15:29:00,929 INFO L226 Difference]: Without dead ends: 186 [2020-08-18 15:29:00,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-18 15:29:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-18 15:29:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 15:29:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-18 15:29:00,945 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-18 15:29:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,946 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-18 15:29:00,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-18 15:29:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 15:29:00,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:00,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:29:00,948 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-18 15:29:00,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467908899] [2020-08-18 15:29:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467908899] [2020-08-18 15:29:00,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632132937] [2020-08-18 15:29:00,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,982 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-18 15:29:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,008 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-18 15:29:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 15:29:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,010 INFO L225 Difference]: With dead ends: 276 [2020-08-18 15:29:01,010 INFO L226 Difference]: Without dead ends: 190 [2020-08-18 15:29:01,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-18 15:29:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-18 15:29:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 15:29:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-18 15:29:01,024 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-18 15:29:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,025 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-18 15:29:01,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-18 15:29:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 15:29:01,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:29:01,028 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-18 15:29:01,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985968883] [2020-08-18 15:29:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985968883] [2020-08-18 15:29:01,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746500869] [2020-08-18 15:29:01,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,055 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-18 15:29:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,079 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-18 15:29:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 15:29:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,082 INFO L225 Difference]: With dead ends: 332 [2020-08-18 15:29:01,082 INFO L226 Difference]: Without dead ends: 330 [2020-08-18 15:29:01,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-18 15:29:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-18 15:29:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 15:29:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-18 15:29:01,097 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-18 15:29:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,098 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-18 15:29:01,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-18 15:29:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 15:29:01,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:29:01,101 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-18 15:29:01,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691491134] [2020-08-18 15:29:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691491134] [2020-08-18 15:29:01,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218761182] [2020-08-18 15:29:01,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,136 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-18 15:29:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,173 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-18 15:29:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 15:29:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,176 INFO L225 Difference]: With dead ends: 604 [2020-08-18 15:29:01,176 INFO L226 Difference]: Without dead ends: 354 [2020-08-18 15:29:01,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-18 15:29:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-18 15:29:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-18 15:29:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-18 15:29:01,195 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-18 15:29:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,195 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-18 15:29:01,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-18 15:29:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 15:29:01,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:29:01,199 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-18 15:29:01,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789499179] [2020-08-18 15:29:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789499179] [2020-08-18 15:29:01,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43347883] [2020-08-18 15:29:01,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,227 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-18 15:29:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,248 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-18 15:29:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 15:29:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,251 INFO L225 Difference]: With dead ends: 528 [2020-08-18 15:29:01,251 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 15:29:01,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 15:29:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-18 15:29:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 15:29:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-18 15:29:01,266 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-18 15:29:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,267 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-18 15:29:01,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-18 15:29:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 15:29:01,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:29:01,269 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-18 15:29:01,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401081103] [2020-08-18 15:29:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401081103] [2020-08-18 15:29:01,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739932541] [2020-08-18 15:29:01,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,312 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-18 15:29:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,347 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-18 15:29:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 15:29:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,351 INFO L225 Difference]: With dead ends: 620 [2020-08-18 15:29:01,351 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 15:29:01,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 15:29:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-18 15:29:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-18 15:29:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-18 15:29:01,373 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-18 15:29:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,373 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-18 15:29:01,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-18 15:29:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 15:29:01,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:29:01,377 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-18 15:29:01,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757571435] [2020-08-18 15:29:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757571435] [2020-08-18 15:29:01,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479444229] [2020-08-18 15:29:01,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,423 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-18 15:29:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,461 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-18 15:29:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 15:29:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,466 INFO L225 Difference]: With dead ends: 1180 [2020-08-18 15:29:01,466 INFO L226 Difference]: Without dead ends: 682 [2020-08-18 15:29:01,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-18 15:29:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-18 15:29:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-18 15:29:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-18 15:29:01,493 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-18 15:29:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,495 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-18 15:29:01,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-18 15:29:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:29:01,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:29:01,499 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-18 15:29:01,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920920097] [2020-08-18 15:29:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920920097] [2020-08-18 15:29:01,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339129770] [2020-08-18 15:29:01,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,544 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-18 15:29:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,570 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-18 15:29:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 15:29:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,576 INFO L225 Difference]: With dead ends: 1020 [2020-08-18 15:29:01,576 INFO L226 Difference]: Without dead ends: 698 [2020-08-18 15:29:01,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-18 15:29:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-18 15:29:01,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-18 15:29:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-18 15:29:01,606 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-18 15:29:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,607 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-18 15:29:01,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-18 15:29:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:29:01,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 15:29:01,610 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,610 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-18 15:29:01,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575762310] [2020-08-18 15:29:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575762310] [2020-08-18 15:29:01,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964240961] [2020-08-18 15:29:01,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,658 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-18 15:29:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,697 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-18 15:29:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 15:29:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,703 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 15:29:01,704 INFO L226 Difference]: Without dead ends: 1162 [2020-08-18 15:29:01,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-18 15:29:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-18 15:29:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-18 15:29:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-18 15:29:01,745 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-18 15:29:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,746 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-18 15:29:01,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-18 15:29:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:29:01,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 15:29:01,749 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,750 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-18 15:29:01,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293647274] [2020-08-18 15:29:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293647274] [2020-08-18 15:29:01,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683196570] [2020-08-18 15:29:01,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,785 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-18 15:29:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,836 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-18 15:29:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 15:29:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,844 INFO L225 Difference]: With dead ends: 2316 [2020-08-18 15:29:01,844 INFO L226 Difference]: Without dead ends: 1322 [2020-08-18 15:29:01,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-18 15:29:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-18 15:29:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-18 15:29:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-18 15:29:01,894 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-18 15:29:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,895 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-18 15:29:01,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-18 15:29:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 15:29:01,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:01,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 15:29:01,898 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-18 15:29:01,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628509182] [2020-08-18 15:29:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628509182] [2020-08-18 15:29:01,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030105948] [2020-08-18 15:29:01,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,922 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-18 15:29:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,959 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-18 15:29:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 15:29:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:01,967 INFO L225 Difference]: With dead ends: 1980 [2020-08-18 15:29:01,967 INFO L226 Difference]: Without dead ends: 1354 [2020-08-18 15:29:01,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-18 15:29:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-18 15:29:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-18 15:29:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-18 15:29:02,014 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-18 15:29:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:02,014 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-18 15:29:02,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-18 15:29:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 15:29:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:02,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:02,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 15:29:02,018 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-18 15:29:02,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:02,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007268742] [2020-08-18 15:29:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:02,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007268742] [2020-08-18 15:29:02,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:02,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:02,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392573038] [2020-08-18 15:29:02,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:02,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:02,038 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-18 15:29:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:02,086 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-18 15:29:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:02,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 15:29:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:02,097 INFO L225 Difference]: With dead ends: 2186 [2020-08-18 15:29:02,097 INFO L226 Difference]: Without dead ends: 2184 [2020-08-18 15:29:02,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-18 15:29:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-18 15:29:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-18 15:29:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-18 15:29:02,165 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-18 15:29:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:02,165 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-18 15:29:02,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-18 15:29:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 15:29:02,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:02,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:29:02,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 15:29:02,170 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-18 15:29:02,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:02,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970291432] [2020-08-18 15:29:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:02,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970291432] [2020-08-18 15:29:02,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:02,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:02,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645963436] [2020-08-18 15:29:02,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:02,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:02,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:02,200 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-18 15:29:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:02,279 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-18 15:29:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:02,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 15:29:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:02,280 INFO L225 Difference]: With dead ends: 4552 [2020-08-18 15:29:02,280 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:29:02,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:29:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:29:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:29:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:29:02,288 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-18 15:29:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:02,288 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:29:02,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:29:02,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:29:02,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 15:29:02,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:29:02,316 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 15:29:02,316 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:29:02,317 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:29:02,318 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 15:29:02,318 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 15:29:02,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 15:29:02,318 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-18 15:29:02,318 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-18 15:29:02,318 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,318 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-18 15:29:02,319 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-18 15:29:02,319 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-18 15:29:02,319 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-18 15:29:02,319 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-18 15:29:02,319 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,319 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-18 15:29:02,319 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,320 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,320 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-18 15:29:02,320 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,320 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-18 15:29:02,320 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,320 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,320 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-18 15:29:02,320 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-18 15:29:02,322 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-18 15:29:02,322 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,322 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,322 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,322 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-18 15:29:02,323 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,323 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-18 15:29:02,323 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-18 15:29:02,323 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,323 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 15:29:02,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:29:02 BoogieIcfgContainer [2020-08-18 15:29:02,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:29:02,347 INFO L168 Benchmark]: Toolchain (without parser) took 3340.05 ms. Allocated memory was 138.9 MB in the beginning and 248.0 MB in the end (delta: 109.1 MB). Free memory was 100.9 MB in the beginning and 98.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 111.7 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:02,353 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 15:29:02,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.89 ms. Allocated memory is still 138.9 MB. Free memory was 100.7 MB in the beginning and 90.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:02,355 INFO L168 Benchmark]: Boogie Preprocessor took 114.40 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 90.4 MB in the beginning and 180.3 MB in the end (delta: -89.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:02,356 INFO L168 Benchmark]: RCFGBuilder took 398.42 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 163.4 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:02,356 INFO L168 Benchmark]: TraceAbstraction took 2557.68 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 163.4 MB in the beginning and 98.3 MB in the end (delta: 65.1 MB). Peak memory consumption was 110.7 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:02,363 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.89 ms. Allocated memory is still 138.9 MB. Free memory was 100.7 MB in the beginning and 90.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.40 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 90.4 MB in the beginning and 180.3 MB in the end (delta: -89.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.42 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 163.4 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2557.68 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 163.4 MB in the beginning and 98.3 MB in the end (delta: 65.1 MB). Peak memory consumption was 110.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...